1622979409 has 8 divisors (see below), whose sum is σ = 1750873320. Its totient is φ = 1498688256.

The previous prime is 1622979349. The next prime is 1622979431. The reversal of 1622979409 is 9049792261.

It can be written as a sum of positive squares in 4 ways, for example, as 549761809 + 1073217600 = 23447^2 + 32760^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1622979409 - 2²³ = 1614590801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1622979469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 899754 + ... + 901555.

It is an arithmetic number, because the mean of its divisors is an integer number (218859165).

Almost surely, 2^1622979409 is an apocalyptic number.

It is an amenable number.

1622979409 is a deficient number, since it is larger than the sum of its proper divisors (127893911).

1622979409 is a wasteful number, since it uses less digits than its factorization.

1622979409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1801379.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 1622979409 is about 40286.2185989204. The cubic root of 1622979409 is about 1175.1798509065.

The spelling of 1622979409 in words is "one billion, six hundred twenty-two million, nine hundred seventy-nine thousand, four hundred nine".